Duplexes have more appliances (2 kitchens and two heating/AC units) so that is a disatvantage but a used appliance can be fixed in an hour, a hole in the wall take a lot more time.  

Guarini Plumbers in Jersey City are great and A Degree Above Heating & Cooling are very personable. 

U still need the human element in the woods be hard to have robots out there walking up and down 10 to 30 degree pitch's where feller bunchers cant work and the trees still need human fellers to cut them down..

It does require some kind of power, but if you have A/C and heat then it works off of the one that is not currently pulling power.

Gas/Heat/Hot Water is included in the rental, when completing the proposed rent form could I ask for more rent money or should I stick to what the property is originally listed for? 

Mechanicals are in good shapeARV: $280k-$300k~$74kish left on the mortgage - 6.75% interest about $890 monthly payment / HOA ~$200 a month / Insurance $35 a month / Taxes $355 per month / Tenant pays Water, Gas Heat. 

I raised the rent to $800 because I was planning to transition the units to paying for their own heat so a lower rent amount was fair.

A house can pass inspection but once someone is living there it's being put under daily stress (faucets turned on/off, heat/AC on an off, etc) so be prepared for repair costs 

@John Su tenants typically take care of snow when occupied, but owner is responsible when vacant - and some cities write tickets if snow not removed with x hours.In colder climates you also have to worry about keeping heat on when vacant so pipes don't freeze.

I didn't like that it took half an hour to heat up, meaning I had to think of it in advance.